The data collection and communication capabilities of IO- Link provide increased visibility into the operation of individual sensors, as well as dispersed sensor networks, and speed the data up to a PLC and the Cloud.
How do you combine Modbus and IO-Link?
One of the first tools to consider is a hybrid I/O Modbus hub like the 8-port bimodal to Modbus R95C- 8B21-MQ. This discrete bimodal to Modbus hub connects two discrete channels to each of the eight unique ports, providing access to monitor and configure those ports via Modbus registers. Hybrid I/O Modbus hubs are available with four configurable analog inputs (voltage or current) and four analog outputs, plus eight configurable PNP (sourcing) or NPN (sinking) discrete inputs and outputs for increased application flexibility. DXMR90-X1 industrial controllers can be used as a platform for IIoT solutions. They can consolidate data from multiple sources for local data processing and accessibility. The DXMR90 contains individual Modbus clients supporting simultaneous communication to up to five independent serial networks.
Figure 2: IO-Link converters, hubs, and masters can collect data from field devices and push it up to data consumers like PLCs, HMIs, and CDS. (Image source: Banner Engineering)
Increased factory automation and expansion can be facilitated using a gateway that supports both IO-Link and higher-level protocols like Modbus TCP or EtherNet/ IP and can function as a bridge between a field-level sensor network and an industrial network communications backbone. IO-Link increases operational efficiency by providing a standardized, uniform configuration process for all sensors, and it can be used to replace defective sensors automatically when an identical model is used.
Why combine IO-Link with other protocols? Mass customization and flexible production processes are distinguishing characteristics of Industry 4.0. Combining IO-Link with other protocols can increase the flexibility and versatility of Industry 4.0 factories. Beneficial characteristics of IO-Link include: Modbus has limited support for analog devices like certain sensors, while IO-Link is compatible with both digital and analog devices.
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